STYLE: corrected comments - spelling + wording

src/finiteVolume/cfdTools/general/fieldSources/pressureGradientExplicitSource/pressureGradientExplicitSource.H

@@ -84,7 +84,7 @@ class pressureGradientExplicitSource
         //- Name of cell source
         word cellSource_;
 
-        //- The method by which the cells will be selecetd
+        //- The method by which the cells will be selected
         autoPtr<topoSetSource> cellSelector_;
 
         //- The set of selected cells

src/finiteVolume/cfdTools/general/fieldSources/timeActivatedExplicitSource/timeActivatedExplicitSource.H

@@ -28,7 +28,7 @@ Class
 Description
     Base class for field sources. Provides:
     - name
-    - references to mesh and time
+    - references to mesh and time databases
     - dimensions
     - volume type
     - startTime

src/postProcessing/functionObjects/field/fieldValues/fieldValue/fieldValue.C

@@ -57,7 +57,7 @@ void Foam::fieldValue::movePoints(const Field<point>&)
 
 void Foam::fieldValue::makeFile()
 {
-    // Create the forces file if not already created
+    // Create the output file if not already created
     if (outputFilePtr_.empty())
     {
         if (debug)