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re: https://www.gnu.org/software/m4/manual/m4.html - UPDATE


From: Howard Johnson
Subject: re: https://www.gnu.org/software/m4/manual/m4.html - UPDATE
Date: Sun, 11 Feb 2018 10:20:50 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

OOPs.  Now I see that in fact the leading quote is a back tick (not a single tick), while the trailing quote is a single tick.  Strange. 

Might be good to spell this uncommon usage out more clearly in https://www.gnu.org/software/m4/manual/m4.html#Quoted-strings

i.e. say:

    A quoted string is a sequence of characters surrounded by quote strings, defaulting to ‘`’ (back tick) and ‘'’ (single quote), where the nested begin and end quotes within the string are balanced. The value of a string token is the text, with one level of quotes stripped off.

rather than just:

    A quoted string is a sequence of characters surrounded by quote strings, defaulting to ‘`’ and ‘'’, where the nested begin and end quotes within the string are balanced. The value of a string token is the text, with one level of quotes stripped off.




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