--- pkglab-1.4.2.orig/doc/pkglab.tex
+++ pkglab-1.4.2/doc/pkglab.tex
@@ -83,10 +83,10 @@
   sets; used to track the contents of a distribution through times
   \item[Dates] (denoted: {\tt YYYY-MM-DD})
   \item[Date ranges] (denoted: {\tt [YYYY-MM-DD;YYYY-MM-DD]})
-  \item[Specifications] (denoted: {\tt [. kde (>= 5.2) .]}) A selector
+  \item[Specifications] (denoted: {\tt [. kde (>= '5.2) .]}) A selector
   on the versions of a unit, in this case all versions of the unit {\tt kde}
   greater than or equal to {\tt 5.2}. The version is optional;
-  {\tt [. kde .]} is a valid specification as well.
+  {\tt [. kde .]} is a valid specification as well. The spaces between the {\tt [.} brackets and the specification are necessary!
   \item[Sets] (denoted: {\tt \{a, b, \ldots\}})
   \item[Diagnoses] The result of a check operation: a list of packages that
   are not installable with their reasons.
@@ -98,7 +98,7 @@
 prefixed by a dollar sign ({\tt \$}). Assignment is done as follows:
 
 \codebox{
-> \$a <- select([. kde (>= 5.2) .])
+> \$a <- select([. kde (>= '5.2) .])
 }
 
 Pkglab has the following operators: