doc: Trim .txt files trailing whitespace
via OSX: find . -name '*.txt' -exec sed -i '' -E 's/[[:space:]]+$//' {} +
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@ -175,17 +175,17 @@ for themselves. For example:
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example meaning
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============== ============================================================
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``\040`` is another way of writing a space
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``\40`` is the same, provided there are fewer than 40 previous
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``\40`` is the same, provided there are fewer than 40 previous
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capturing subpatterns
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``\7`` is always a back reference
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``\11`` might be a back reference, or another way of writing a tab
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``\011`` is always a tab
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``\0113`` is a tab followed by the character "3"
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``\113`` might be a back reference, otherwise the character with
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``\113`` might be a back reference, otherwise the character with
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octal code 113
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``\377`` might be a back reference, otherwise the byte consisting
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``\377`` might be a back reference, otherwise the byte consisting
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entirely of 1 bits
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``\81`` is either a back reference, or a binary zero followed by
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``\81`` is either a back reference, or a binary zero followed by
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the two characters "8" and "1"
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============== ============================================================
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@ -240,7 +240,7 @@ even when Unicode character property support is available.
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Simple assertions
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-----------------
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The fourth use of backslash is for certain `simple assertions`:idx:. An
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The fourth use of backslash is for certain `simple assertions`:idx:. An
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assertion specifies a condition that has to be met at a particular point in
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a match, without consuming any characters from the subject string. The use of
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subpatterns for more complicated assertions is described below. The
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