Typos

The stepcode typos aren't to be found upstream. Recomend we merge nonetheless.

src/Mod/Spreadsheet/App/Sheet.cpp

@@ -131,7 +131,7 @@ void Sheet::clearAll()
   * Import a file into the spreadsheet object.
   *
   * @param filename   Name of file to import
-  * @param delimiter  The field delimiter charater used.
+  * @param delimiter  The field delimiter character used.
   * @param quoteChar  Quote character, if any (set to '\0' to disable).
   * @param escapeChar The escape character used, if any (set to '0' to disable).
   *

src/Mod/Spreadsheet/App/SheetPy.xml

@@ -57,7 +57,7 @@
     </Methode>
     <Methode Name="splitCell">
       <Documentation>
-        <UserDocu>Split a perviously merged cell</UserDocu>
+        <UserDocu>Split a previously merged cell</UserDocu>
       </Documentation>
     </Methode>
     <Methode Name="insertColumns">

src/Mod/Spreadsheet/importXLSX.py

@@ -167,7 +167,7 @@ class exprNode(object):
 
 
 class FormulaTranslator(object):
-  ''' This class tranlates a cell-formula from Excel to FreeCAD.'''
+  ''' This class translates a cell-formula from Excel to FreeCAD.'''
   def __init__(self):
     self.tokenList = ['=']