fix a couple of issues in shell scripts found by codacy.

man/buildman.sh

@@ -1,4 +1,4 @@
-#/bin/sh
+#!/bin/sh
 
 xsltproc -o manual.html /usr/share/xml/docbook/stylesheet/nwalsh/xhtml/docbook.xsl manual.docbook
 

test/cfg/runtests.sh

@@ -2,7 +2,7 @@
 set -e # abort on error
 set -x # be verbose
 
-if [[ `pwd` == */test/cfg ]] ; then # we are in test/cfg
+if [[ $(pwd) == */test/cfg ]] ; then # we are in test/cfg
 	CPPCHECK="../../cppcheck"
 	DIR=""
 else # assume we are in repo root

tools/test_showtimetop5.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
-if  [[ "`./cppcheck  --showtime=top5 cli/cmdlineparser.h --quiet | wc -l`" != 7 ]] ; then
+if  [[ "$(./cppcheck  --showtime=top5 cli/cmdlineparser.h --quiet | wc -l)" != 7 ]] ; then
     false
 fi

tools/testrunnerify_code.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-cat $1 | sed s@\"@\\\\\"@g | sed s@^@\"@ | sed s@\$@\\\\n\"@ | sed 's@\t@    @g'
+sed s@\"@\\\\\"@g | sed s@^@\"@ $1 | sed s@\$@\\\\n\"@ | sed 's@\t@    @g'

tools/times-tags.sh

@@ -10,7 +10,7 @@
 
 rm times-tags.txt
 
-for i in `seq $1 $2`;
+for i in $(seq $1 $2);
 do
     echo "1.$i"
     echo "1.$i" >> times-tags.txt

tools/times.sh

@@ -15,12 +15,12 @@ make clean
 
 git reset --hard HEAD > times.log
 
-for i in `seq 1 50`; do
-    git_head=`git log -1 --format=%h`
+for i in $(seq 1 50); do
+    git_head=$(git log -1 --format=%h)
     # if build fails, make clean and try again
     make SRCDIR=build CXXFLAGS=-O2 -j4 || make clean ; make SRCDIR=build CXXFLAGS=-O2 -j4
     echo "Run number $i"
-    for j in `seq 1 ${iterations}`; do
+    for j in $(seq 1 ${iterations}); do
         ./cppcheck --quiet --showtime=summary --enable=all --inconclusive src 2> /dev/null | tee -a times.log
     done
     grep "Overall" times.log | tail -${iterations} | sed s/s// | awk -v "i=$i" -v "iterations=$iterations" -v "git_head=$git_head"  '{ sum+=$3} END {print "Run " i",  "git_head  "  Average: " sum/iterations}' | tee -a times.log