Indic2 all: update note treatment of placeholder and standalone sylla…

…bles.

opentype-shaping-bengali.md

@@ -533,11 +533,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -608,6 +611,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-gujarati.md

@@ -487,11 +487,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -562,6 +565,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-gurmukhi.md

@@ -543,11 +543,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -618,6 +621,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-indic-general.md

@@ -844,11 +844,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -919,6 +922,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-kannada.md

@@ -504,11 +504,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -579,6 +582,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-malayalam.md

@@ -539,11 +539,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -614,6 +617,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-oriya.md

@@ -544,11 +544,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -619,6 +622,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-sinhala.md

@@ -462,11 +462,14 @@ _other_		= `OTHER`| `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -537,6 +540,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-tamil.md

@@ -496,11 +496,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -571,6 +574,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL

opentype-shaping-telugu.md

@@ -517,11 +517,14 @@ _other_		= `OTHER` | `MODIFYING_LETTER`
 > Note: The _placeholder_ identification class includes codepoints
 > that are often used in place of vowels or consonants when a document
 > needs to display a matra, mark, or special form in isolation or
-> in another context beyond a standard syllable. Examples include
-> hyphens and non-breaking spaces. The _placeholder_ identification
-> class also includes numerals, which are commonly used as word
-> substitutes within normal text. Examples include ordinals (e.g.,
-> "4th").
+> in another context beyond a standard syllable. Examples of
+> _placeholder_ codepoints include hyphens and non-breaking
+> spaces. Sequences that utilize this approach should be identified as
+> "standalone" syllables.
+>
+> The _placeholder_ identification class also includes numerals, which
+> are commonly used as word substitutes within normal text. Examples
+> include ordinals (e.g., "4th").
 
 > Note: The _other_ identification class includes codepoints that
 > do not interact with adjacent characters for shaping purposes. Even
@@ -592,6 +595,13 @@ A standalone syllable will match the expression:
 > choose to limit occurrences by limiting the above expressions to a
 > finite length, such as `(HALANT_GROUP CN){0,4}` .
 
+> Note: Although they are labelled as "standalone syllables" here,
+> many sequences that match the standalone regular expression above
+> are instances where a document needs to display a matra, combining
+> mark, or special form in isolation. Such sequences might not have
+> any significance with regard to the definition of syllables used in
+> the language or orthography of the text.
+
 A symbol-based syllable will match the expression:
 ```markdown
 S SYLLABLE_TAIL