gnu: Add texlive-latex-trimspaces.

* gnu/packages/tex.scm (texlive-latex-trimspaces): New variable.

gnu/packages/tex.scm

@@ -1983,6 +1983,39 @@ (define-public texlive-latex-seminar
 21st-century presentation styles.")
     (license license:lppl1.2+)))
 
+(define-public texlive-latex-trimspaces
+  (package
+    (name "texlive-latex-trimspaces")
+    (version (number->string %texlive-revision))
+    (source (origin
+              (method svn-fetch)
+              (uri (texlive-ref "latex" "trimspaces"))
+              (sha256
+               (base32
+                "0da00lb32am4g63mn96625wg48p3pj3spx79lajrk17d549apwqa"))))
+    (build-system texlive-build-system)
+    (arguments
+     '(#:tex-directory "latex/trimspaces"
+       #:tex-format "latex"
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-bug
+           (lambda _
+             ;; The "ins" file refers to the wrong source file.
+             (substitute* "trimspaces.ins"
+               (("pstool.tex") "trimspaces.tex"))
+             #t)))))
+    (inputs
+     `(("texlive-latex-filecontents" ,texlive-latex-filecontents)))
+    (home-page "http://www.ctan.org/pkg/trimspaces")
+    (synopsis "Trim spaces around an argument or within a macro")
+    (description
+     "This very short package allows you to expandably remove spaces around a
+token list (commands are provided to remove spaces before, spaces after, or
+both); or to remove surrounding spaces within a macro definition, or to define
+space-stripped macros.")
+    (license license:lppl)))
+
 (define-public texlive-latex-capt-of
   (package
     (name "texlive-latex-capt-of")