CI: check for other whitespace blunders as well

.gitlab-ci.yml

@@ -33,10 +33,10 @@ build package:
     untracked: true
     expire_in: 1 hour
 
-check for whitespace:
+check whitespace style:
   stage: build
   script:
-    - "! for f in `git ls-files | grep -v \\.diff$`; do file $f | grep -q ' text' && grep -l '[[:blank:]]$' $f; done | grep . >&2"
+    - "! for f in `git ls-files | grep -v \\.diff$`; do file $f | grep -q ' text' || continue; grep -q '[[:blank:]]$' $f && echo $f: trailing whitespace; tail -n1 $f | read -r _ || echo $f: no newline at end of file; tail -n1 $f | grep -q '^$' && echo $f: empty line at end of file; done | grep . >&2"
   allow_failure: true
 
 check for dependencies installed:

doc/source/pre/whatsnew/1.3.rst

@@ -61,4 +61,4 @@ namely time-reversal symmetry, particle-hole symmetry and chiral (or
 sublattice) symmetry. When one or more of these symmetries are present,
 and it can be useful to have leads with scattering states that reflect this.
 It is now possible to these discrete symmetries in Kwant, which then uses
-them to construct scattering states that are accordingly symmetric.
\ No newline at end of file
+them to construct scattering states that are accordingly symmetric.

kwant/physics/tests/test_leads.py

@@ -604,4 +604,4 @@ def test_PHS_TRIM():
                         assert_almost_equal(phs_modes[:, 1::2], p_mat.dot(phs_modes[:, ::2].conj()),
                                             err_msg='PHS broken at a TRIM in ' + sym)
                         assert_almost_equal(phs_modes.T.conj().dot(phs_modes), np.eye(phs_modes.shape[1]),
-                                           err_msg='Modes are not orthonormal, TRIM PHS in ' + sym)
\ No newline at end of file
+                                           err_msg='Modes are not orthonormal, TRIM PHS in ' + sym)