Fix typo, add additional 'branch expression' clarification.

Signed-off-by: Henry Cox <[email protected]>

Author: henry2cox

man/geninfo.1

@@ -1103,9 +1103,9 @@ The following is an example branch records whose
 expression values are human-readable strings.
 
 .RS
-  BRDA:10,0,enable:1
+  BRDA:10,0,enable,1
 .br
-  BRDA:10,0,!enable:0
+  BRDA:10,0,!enable,0
 .RE
 In this case, the corresponding code from line 10 is very likely similar to:
 .br
@@ -1119,7 +1119,10 @@ In this case, the corresponding code from line 10 is very likely similar to:
 .RE
 such that associated testcase entered the block ('enable' evaulated to 'true').
 
-Arbitrarily complicated branch expressions are supported.
+Arbitrarily complicated branch expressions are supported - including branch expressions which contain commas (e.g., in an expression containing a function call).
+
+Note that particular tools may or may not suppress expressions which are statically true or statically false - e.g., expressions using template parameters.
+This makes it potentially complicated to compare coverage data generated by two different tools.
 
 
 Branch coverage summaries are stored in two lines: