This patch fixes some quotations inside comments. The change in syntax highlighting was bothering me. I also found a typo.

ChangeLog:

2020-05-06  Erick Ochoa <erick.oc...@theobroma-systems.com>

        * gcc/tree-ssa-struct-alias.c: Fix comments


diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
index 416a26c996c..37c9b8c26a1 100644
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -57,11 +57,11 @@
    as a consequence.

    See  "Efficient Field-sensitive pointer analysis for C" by "David
-   J. Pearce and Paul H. J. Kelly and Chris Hankin, at
+   J. Pearce and Paul H. J. Kelly and Chris Hankin", at
    http://citeseer.ist.psu.edu/pearce04efficient.html

    Also see "Ultra-fast Aliasing Analysis using CLA: A Million Lines
-   of C Code in a Second" by ""Nevin Heintze and Olivier Tardieu" at
+   of C Code in a Second" by "Nevin Heintze and Olivier Tardieu" at
    http://citeseer.ist.psu.edu/heintze01ultrafast.html

    There are three types of real constraint expressions, DEREF,
@@ -84,7 +84,7 @@
    Each variable for a structure field has

    1. "size", that tells the size in bits of that field.
-   2. "fullsize, that tells the size in bits of the entire structure.
+   2. "fullsize", that tells the size in bits of the entire structure.
    3. "offset", that tells the offset in bits from the beginning of the
    structure to this field.

@@ -188,7 +188,7 @@

    We probably should compute a per-function unit-ESCAPE solution
    propagating it simply like the clobber / uses solutions.  The
-   solution can go alongside the non-IPA espaced solution and be
+   solution can go alongside the non-IPA escaped solution and be
    used to query which vars escape the unit through a function.
    This is also required to make the escaped-HEAP trick work in IPA mode.

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