Author: Dan Theisen <djt@hxx.in>
Date:   Wed Jun 06 03:30:25 2018 -0800

The following lines have a subtle change around [:blank:], changing it
to [[:blank:]] instead. This is required because POSIX treats characters
inside of brackets as a group of characters to match against. In this case,
[[:space:]] means [] group of characters, and [:space:] is the group, as per:
IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008), Chapter 9
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html

--- tcsh-6.20.00/tests/lexical.at.old	2018-06-06 02:20:16.787145186 -0700
+++ tcsh-6.20.00/tests/lexical.at	2018-06-06 02:21:09.537890842 -0700
@@ -567,10 +567,10 @@
 ]])
 AT_DATA([uniformity_test.csh],
 [[
-set SERVICE_NAME_LOG = `cat batchsystem.properties | grep '^jdbc_url' | sed -ne 's/^[^=]*=[^@]*@[:blank:]*\([^$]*\)$/\1/p' | perl -pe 's/\s//g'  |  perl -pe 's/\)/\\\)/g' | perl -pe 's/\(/\\\(/g'`
+set SERVICE_NAME_LOG = `cat batchsystem.properties | grep '^jdbc_url' | sed -ne 's/^[^=]*=[^@]*@[[:blank:]]*\([^$]*\)$/\1/p' | perl -pe 's/\s//g'  |  perl -pe 's/\)/\\\)/g' | perl -pe 's/\(/\\\(/g'`
 echo -n "$SERVICE_NAME_LOG" > ./output1
 
-cat batchsystem.properties | grep '^jdbc_url' | sed -ne 's/^[^=]*=[^@]*@[:blank:]*\([^$]*\)$/\1/p' | perl -pe 's/\s//g'  |  perl -pe 's/\)/\\\)/g' | perl -pe 's/\(/\\\(/g' > ./output2
+cat batchsystem.properties | grep '^jdbc_url' | sed -ne 's/^[^=]*=[^@]*@[[:blank:]]*\([^$]*\)$/\1/p' | perl -pe 's/\s//g'  |  perl -pe 's/\)/\\\)/g' | perl -pe 's/\(/\\\(/g' > ./output2
 
 diff -uprN ./output1 ./output2 >& /dev/null
 
@@ -587,7 +587,7 @@
 echo "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP\)(HOST=db\)(PORT=1521\)\)(CONNECT_DATA=(SERVER=DEDICATED\)(SERVICE_NAME=bns03\)\)\)" > ./expected_result
 
 set string = "jdbc_url=jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=db)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=bns03)))"
-set SERVICE_NAME_LOG  = `echo "$string" | grep '^jdbc_url' | sed -ne 's/^[^=]*=[^@]*@[:blank:]*\([^$]*\)$/\1/p' | perl -pe 's/\)/\\\)/g'`
+set SERVICE_NAME_LOG  = `echo "$string" | grep '^jdbc_url' | sed -ne 's/^[^=]*=[^@]*@[[:blank:]]*\([^$]*\)$/\1/p' | perl -pe 's/\)/\\\)/g'`
 
 echo "$SERVICE_NAME_LOG" > ./actual_result