Merge pull request riscv-software-src#19 from foss-for-synopsys-dwc-arc-processors/MnemnonicFix

Small typo mnemonics

Author: AFOliveira

backends/ext_pdf_doc/templates/ext_pdf.adoc.erb

@@ -354,9 +354,9 @@ The following <%= ext.instructions.size %> instructions are added by this extens
 Synopsis::
 <%= i.long_name %>
 
-Mnemoic::
+Mnemonic::
 ----
-<%= i.name %><%= i.assembly.gsub('x', 'r') %>
+<%= i.name %> <%= i.assembly.gsub('x', 'r') %>
 ----
 
 Encoding::