Fix 'nubmer' typo, replace with 'number'.

resources/context_help/QgsDelimitedTextSourceSelect

@@ -221,7 +221,7 @@ Each attribute also has a data type, one of string (text), integer, longlong,
 or real number.
 The data type is inferred from the content of the fields - if every non blank value
 is a valid integer then the type is integer, otherwise if it is a valid long long
-nubmer then the type is longlong, otherwise if it is a valid real
+number then the type is longlong, otherwise if it is a valid real
 number then the type is real, otherwise the type is string.  Note that this is
 based on the content of the fields - quoting fields does not change the way they
 are interpreted.

scripts/spelling.dat

@@ -300,6 +300,7 @@ nescessary:necessary
 nessessary:necessary
 noticable:noticeable
 notications:notifications
+nubmer:number
 o'caml:OCaml
 occured:occurred
 occurence:occurrence

src/providers/wcs/qgswcsprovider.cpp

@@ -185,7 +185,7 @@ QgsWcsProvider::QgsWcsProvider( QString const &uri )
     return;
   }
 
-  // Get small piece of coverage to find GDAL data type and nubmer of bands
+  // Get small piece of coverage to find GDAL data type and number of bands
   int bandNo = 0; // All bands
   int width;
   int height;