scripts: Fix random typo'd whitespace

Reported by pylint's 'bad-whitespace' warning.

Not gonna enable this warning in the CI check, because it flags stuff
like deliberately aligning assignments and gets too cultish. Just a
cleanup pass.

For whatever reason, the common convention in Python is to skip spaces
around '=' when passing keyword arguments and giving default arguments:

    f(x=3, y=4)
    def f(x, y=8):
        ...

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
diff --git a/scripts/sanity_chk/expr_parser.py b/scripts/sanity_chk/expr_parser.py
index 6dc7813..78d72f5 100644
--- a/scripts/sanity_chk/expr_parser.py
+++ b/scripts/sanity_chk/expr_parser.py
@@ -101,7 +101,7 @@
     ('left', 'OR'),
     ('left', 'AND'),
     ('right', 'NOT'),
-    ('nonassoc' , 'EQUALS', 'NOTEQUALS', 'GT', 'LT', 'GTEQ', 'LTEQ', 'IN'),
+    ('nonassoc', 'EQUALS', 'NOTEQUALS', 'GT', 'LT', 'GTEQ', 'LTEQ', 'IN'),
 )
 
 def p_expr_or(p):