Fix some typos in comments (found by codespell)

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Author: stweil

ccmain/tessedit.cpp

@@ -110,7 +110,7 @@ bool Tesseract::init_tesseract_lang_data(
     return false;
   }
   if (oem == OEM_DEFAULT) {
-    // Set the engine mode from availablity, which can then be overidden by
+    // Set the engine mode from availability, which can then be overidden by
     // the config file when we read it below.
     if (!tessdata_manager.IsLSTMAvailable()) {
       tessedit_ocr_engine_mode.set_value(OEM_TESSERACT_ONLY);

textord/scanedg.cpp

@@ -335,7 +335,7 @@ void join_edges(CRACKEDGE *edge1,  // edges to join
   if (edge1->pos.x() + edge1->stepx != edge2->pos.x()
   || edge1->pos.y() + edge1->stepy != edge2->pos.y()) {
     CRACKEDGE *tempedge = edge1;
-    edge1 = edge2;               // swap araound
+    edge1 = edge2;               // swap around
     edge2 = tempedge;
   }