setupext.py: prevent spurious newline in tkagg compilation command

Author: efiring

setupext.py

@@ -939,11 +939,11 @@ def get_var(file, varname):
         result = p.communicate()[0]
         return result
 
-    tcl_lib_dir = get_var(tcl_config, 'TCL_LIB_SPEC').split()[0][2:]
-    tcl_inc_dir = get_var(tcl_config, 'TCL_INCLUDE_SPEC')[2:]
+    tcl_lib_dir = get_var(tcl_config, 'TCL_LIB_SPEC').split()[0][2:].strip()
+    tcl_inc_dir = get_var(tcl_config, 'TCL_INCLUDE_SPEC')[2:].strip()
     tcl_lib = get_var(tcl_config, 'TCL_LIB_FLAG')[2:].strip()
 
-    tk_lib_dir = get_var(tk_config, 'TK_LIB_SPEC').split()[0][2:]
+    tk_lib_dir = get_var(tk_config, 'TK_LIB_SPEC').split()[0][2:].strip()
     tk_inc_dir = get_var(tk_config, 'TK_INCLUDE_SPEC').strip()
     if tk_inc_dir == '':
         tk_inc_dir = tcl_inc_dir