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docs: omnibus cleanup

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Includes harmonizing the display of options and arguments, standardising
terminology, using the envvar directive more broadly, adding help options to all
commands that support them, simplifying some language, and tidying up multiple
formatting issues.

string documentation is not changed.
This commit is contained in:
David Adam
2022-03-12 00:18:41 +08:00
parent e23e52a8e9
commit 3a23fdf359
66 changed files with 278 additions and 143 deletions
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doc_src/cmds/printf.rst
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@@ -19,9 +19,9 @@ Description
To see the documentation on the ``printf`` command you might have,
use ``command man printf``.
printf uses the format string FORMAT to print the ARGUMENT arguments. This means that it takes format specifiers in the format string and replaces each with an argument.
``printf`` uses the format string *FORMAT* to print the *ARGUMENT* arguments. This means that it takes format specifiers in the format string and replaces each with an argument.
The ``format`` argument is re-used as many times as necessary to convert all of the given arguments. So ``printf %s\n flounder catfish clownfish shark`` will print four lines.
The *FORMAT* argument is re-used as many times as necessary to convert all of the given arguments. So ``printf %s\n flounder catfish clownfish shark`` will print four lines.
Unlike :ref:`echo <cmd-echo>`, ``printf`` does not append a new line unless it is specified as part of the string.