utils/str.3: Fix typeface for mathematics.

diff --git a/utils/str.3 b/utils/str.3
index 13bc18f..09a6f24 100644 (file)
--- a/utils/str.3
+++ b/utils/str.3
@@ -151,7 +151,8 @@ with a zero flags word, which is the normal case.
 The function
 .B str_sanitize
 copies at most
-.I sz \- 1
+.I sz
+\- 1
 characters from the string
 .I p
 to