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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
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+Date: 05 Nov 1993 16:34:28 -0500 (EST)
+From: Michael Downes <MJD@MATH.AMS.ORG>
+Subject: Around the Bend #15
+To: info-tex@shsu.edu
+X-ListName: TeX-Related Network Discussion List <INFO-TeX@SHSU.edu>
+
+========================================================================
+*** Exercise 15
+(a) Write a macro \trimspace that takes another macro as its argument and
+removes a trailing space from the replacement text of the macro, if one
+is present, and otherwise leaves it unchanged.
+
+(b) Write a macro \trimspaces that removes a leading space, if
+present, and then calls \trimspace to remove a trailing space.
+
+========================================================================
+
+Motivation: If a user inadvertently includes an extra space
+in a text argument, such as a section heading:
+
+ \section{Title of the section }
+
+then you must usually take care to remove the space when typesetting
+the text. The simple way is to perform an \unskip at the end (if the
+text is immediately followed by \par, the \unskip operation is
+built-in) and an \ignorespaces at the beginning, but various
+complications can arise, so it would be preferable to be able to apply
+a \trimspaces function when an argument is first read, and then have
+the information in proper form for all subsequent uses.
+
+Send answers to the address below. A summary will be posted
+November 23, 1993 or thereabouts.
+
+Michael Downes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+mjd@math.ams.org (Internet) ASCII 32--54,55--126: !"#$%&'()*+,-./0123456
+789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~