[evince] backends: Fix typos in tiff backend

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 0ba8eae87615b51c60f9158aa34d72bd9a0d4b3f
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Thu May 21 21:53:07 2020 -0400

    backends: Fix typos in tiff backend

 backend/tiff/tiff2ps.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/backend/tiff/tiff2ps.c b/backend/tiff/tiff2ps.c
index 8f125c38..cc1a9c06 100644
--- a/backend/tiff/tiff2ps.c
+++ b/backend/tiff/tiff2ps.c
@@ -701,7 +701,7 @@ PS_Lvl2colorspace(TIFF2PSContext* ctx, TIFF* tif)
 
        /*
         * Set up PostScript Level 2 colorspace according to
-        * section 4.8 in the PostScript refenence manual.
+        * section 4.8 in the PostScript reference manual.
         */
        fputs("% PostScript Level 2 only.\n", ctx->fd);
        if (ctx->photometric != PHOTOMETRIC_PALETTE) {
@@ -859,7 +859,7 @@ PS_Lvl2ImageDict(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
                        case COMPRESSION_CCITTFAX4:
                                /*
                                 * Manage inverting with /Blackis1 flag
-                                * since there migth be uncompressed parts
+                                * since there might be uncompressed parts
                                 */
                                fputs("  /Decode [0 1]\n", ctx->fd);
                                break;