[bug#70462] [PATCH] import: beautify-description: Fix ". ." case.

[Nicolas Graves]

* guix/import/utils.scm (beautify-description): Ensure the matched
string pre is long enough not to fail.

Change-Id: I3172d9a41350b98222cd9ab758487485f26650b3
---
 guix/import/utils.scm | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/guix/import/utils.scm b/guix/import/utils.scm
index 0cf52cdbde..09a01cf315 100644
--- a/guix/import/utils.scm
+++ b/guix/import/utils.scm
@@ -380,9 +380,10 @@ (define* (beautify-description description #:optional 
(length 80))
                                                       (abbrevs '("Dr" "Mr" 
"Mrs"
                                                                  "Ms" "Prof" 
"vs"
                                                                  "e.g")))
-                                                  (if (or (any (cut 
string-suffix? <> pre) abbrevs)
-                                                          (char-upper-case?
-                                                           (string-ref pre (1- 
(string-length pre)))))
+                                                  (if (and (> (string-length 
pre) 0)
+                                                           (or (any (cut 
string-suffix? <> pre) abbrevs)
+                                                               
(char-upper-case?
+                                                                (string-ref 
pre (1- (string-length pre))))))
                                                       ". "
                                                       ".  ")))
                                               'post)
-- 
2.41.0