some care for pep8 in pyx in modular

[fchapoton]

found using

pycodestyle --select E111,E401,E701,E702,E703,W605,E711,E712,E713,E721,E722 --filename=*.pyx src/sage/modular/

CC: @tscrim @slel @kliem @kwankyu

Component: modular forms

Author: Frédéric Chapoton

Branch/Commit: 2c956e2

Reviewer: David Coudert

Issue created by migration from https://trac.sagemath.org/ticket/33691

[fchapoton]

Commit: b9bd1d8

[fchapoton]

New commits:

b9bd1d8

some care for pep8 in pyx files in modular/

[fchapoton]

Branch: u/chapoton/33691

[fchapoton]

Description changed:

--- 
+++ 
@@ -1 +1,5 @@
+found using
 
+```
+pycodestyle --select E111,E401,E701,E702,E703,W605,E711,E712,E713,E721,E722 --filename=*.pyx src/sage/modular/
+```

[fchapoton]

comment:3

green bot, so please review

[dcoudert]

comment:4

Several times in src/sage/modular/modsym/p1list.pyx: u = u+N -> u = u + N

+    if u < 0:
+        u = u+N
+    if v < 0:
+        v = v+N

[dcoudert]

comment:5

Then you can set it to positive review.

[dcoudert]

Reviewer: David Coudert

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

c2cd0fa

using += where possible in p1list

[sagetrac-git]

Changed commit from b9bd1d8 to c2cd0fa