sage.{algebras,combinat,matroids}: Replace imports from sage.*.all for namespace packages

[mkoeppe]

Using ./sage -fiximports from #34945.

Also remove trailing whitespace in the affected files.

Part of Meta-ticket #32414

CC: @alexchandler100 @fchapoton @tscrim

Component: refactoring

Author: Alex Chandler, Matthias Koeppe

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/34946

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
 Using `./sage -fiximports` from #34945.
+
+Also remove trailing whitespace in the affected files.

[mkoeppe]

Branch: u/mkoeppe/sage__algebras_combinat_matroids___replace_imports_from_sage___all_for_namespace_packages

[mkoeppe]

Commit: bdf2f33

[mkoeppe]

New commits:

bdf2f33

sage -fiximports src/sage/algebras src/sage/combinat src/sage/matroids

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,3 +1,6 @@
 Using `./sage -fiximports` from #34945.
 
 Also remove trailing whitespace in the affected files.
+
+Part of Meta-ticket #32414
+

[mkoeppe]

comment:5

Lint and Build&Test failures are unrelated.

[sagetrac-git]

Changed commit from bdf2f33 to bd50b49

[sagetrac-git]

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

bd50b49

git grep -l -E ' (Q as QQ|Z as ZZ)' | xargs sed -i.bak 's/ Q as QQ/ QQ/;s/ Z as ZZ/ ZZ/;'

[sagetrac-git]

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

8e77597

sage.{algebras,combinat}: Consolidate imports from the same module

[sagetrac-git]

Changed commit from bd50b49 to 8e77597

[mkoeppe]

Changed author from Alex Chandler to Alex Chandler, Matthias Koeppe

[tscrim]

comment:10

LGTM.

[tscrim]

Reviewer: Travis Scrimshaw