tests: adapt tests to change in pwd's default

* tests/misc/pwd-option.sh (base): Initialize with -P,
now that -L is the default, to accommodate an initial
working directory with a symlink component.
* tests/misc/readlink-fp-loop.sh: Use $(env pwd -P) to get the
absolute working directory.  Using "env" ensures we do not invoke
any shell built-in, and PATH ensures we invoke the one from coreutils.
* tests/readlink/can-e.sh: Likewise.
* tests/readlink/can-f.sh: Likewise.
* tests/readlink/can-m.sh: Likewise.

tests/misc/pwd-option.sh

@@ -21,7 +21,7 @@ print_ver_ pwd
 
 mkdir -p a/b || framework_failure_
 ln -s a/b c || framework_failure_
-base=$(env -- pwd)
+base=$(env -- pwd -P)
 
 # Remove any logical paths from $PWD.
 cd "$base" || framework_failure_

tests/misc/readlink-fp-loop.sh

@@ -18,7 +18,7 @@
 
 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
 print_ver_ readlink
-cwd=$("$abs_top_builddir/src/pwd")
+cwd=$(env pwd -P)
 
 # To trigger this bug, we have to construct a name/situation during
 # the resolution of which the code dereferences the same symlink (S)

tests/readlink/can-e.sh

@@ -20,7 +20,7 @@
 print_ver_ readlink
 
 pwd=$(pwd)
-my_pwd=$("$abs_top_builddir/src/pwd")
+my_pwd=$(env pwd -P)
 tmp=d
 
 mkdir $tmp || framework_failure_

tests/readlink/can-f.sh

@@ -20,7 +20,7 @@
 print_ver_ readlink
 
 pwd=$(pwd)
-my_pwd=$("$abs_top_builddir/src/pwd")
+my_pwd=$(env pwd -P)
 tmp=d
 
 mkdir $tmp || framework_failure_

tests/readlink/can-m.sh

@@ -20,7 +20,7 @@
 print_ver_ readlink
 
 pwd=$(pwd)
-my_pwd=$("$abs_top_builddir/src/pwd")
+my_pwd=$(env pwd -P)
 tmp=d
 
 mkdir $tmp || framework_failure_