Trac #28671: fix doctests when DOT_SAGE is symbolic link

If `DOT_SAGE` points to a symbolic link, the following 2 doctests fail,
as symbolic links are not resolved in these tests:
{{{
sage -t --long --warn-long 54.2 src/sage/misc/inline_fortran.py
**********************************************************************
File "src/sage/misc/inline_fortran.py", line 149, in sage.misc.inline_fo
rtran._import_module_from_path._import_module_from_path_impl
Failed example:
    os.getcwd() == os.path.normpath(DOT_SAGE)
Expected:
    True
Got:
    False
**********************************************************************
sage -t --long --warn-long 54.2 src/sage/misc/sage_ostools.pyx
**********************************************************************
File "src/sage/misc/sage_ostools.pyx", line 67, in
sage.misc.sage_ostools.restore_cwd
Failed example:
    with restore_cwd(str(SAGE_TMP)):
        print(os.getcwd() == SAGE_TMP)
Expected:
    True
Got:
    False
}}}

URL: https://trac.sagemath.org/28671
Reported by: gh-mwageringel
Ticket author(s): Markus Wageringel
Reviewer(s): Michael Orlitzky

Author: Release Manager

build/pkgs/configure/checksums.ini

@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=16999eea7613ed2ed183a5b2c3eefc6265685017
-md5=ece66d1eaec2065f7a0e0aad65d71b90
-cksum=906044305
+sha1=2c8db185905f5447481b270fd484ab248e0c9206
+md5=ce2cd746b7a24887bf0322e0d0fd711a
+cksum=4219256350

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-52ba9a76be0b56be044a441ee2448a4f4d93c6c3
+0c6c68bffee0111ee730071a39aad4a2a21d012a

src/sage/misc/inline_fortran.py

@@ -146,7 +146,7 @@ def eval(self, x, globals=None, locals=None):
             Traceback (most recent call last):
             ...
             RuntimeError: failed to compile Fortran code:...
-            sage: os.getcwd() == os.path.normpath(DOT_SAGE)
+            sage: os.getcwd() == os.path.realpath(DOT_SAGE)
             True
         """
         if globals is None:

src/sage/misc/sage_ostools.pyx

@@ -65,7 +65,7 @@ def restore_cwd(chdir=None):
         sage: from sage.misc.misc import SAGE_TMP
         sage: cwd = os.getcwd()
         sage: with restore_cwd(str(SAGE_TMP)):
-        ....:     print(os.getcwd() == SAGE_TMP)
+        ....:     print(os.getcwd() == os.path.realpath(SAGE_TMP))
         True
         sage: cwd == os.getcwd()
         True