Fix some spelling errors (mostly in comments).

src/muz/base/dl_context.h

@@ -615,7 +615,7 @@ namespace datalog {
 
         void ensure_engine();
 
-        // auxilary functions for SMT2 pretty-printer.
+        // auxiliary functions for SMT2 pretty-printer.
         void declare_vars(expr_ref_vector& rules, mk_fresh_name& mk_fresh, std::ostream& out);
 
         //undefined and private copy constructor and operator=

src/muz/base/dl_rule.h

@@ -110,7 +110,7 @@ namespace datalog {
     /**
        \brief Manager for the \c rule class
 
-       \remark \c rule_manager objects are interchangable as long as they
+       \remark \c rule_manager objects are interchangeable as long as they
          contain the same \c ast_manager object.
     */
     class rule_manager

src/muz/base/dl_util.h

@@ -97,7 +97,7 @@ namespace datalog {
        \brief Auxiliary function used to create a tail based on \c pred for a new rule.
        The variables in \c pred are re-assigned using \c next_idx and \c varidx2var.
        A variable is considered non-local to the rule if it is in the set \c non_local_vars.
-       Non-local variables are coppied to new_rule_args, and their sorts to \c new_rule_domain.
+       Non-local variables are copied to new_rule_args, and their sorts to \c new_rule_domain.
        The new predicate is stored in \c new_pred.
     */
     void mk_new_rule_tail(ast_manager & m, app * pred, 

src/muz/base/fp_params.pyg

@@ -143,8 +143,8 @@ def_module_params('fp',
                           ('spacer.native_mbp', BOOL, True, "Use native mbp of Z3"),
                           ('spacer.eq_prop', BOOL, True, "Enable equality and bound propagation in arithmetic"),
                           ('spacer.weak_abs', BOOL, True, "Weak abstraction"),
-                          ('spacer.restarts', BOOL, False, "Enable reseting obligation queue"),
-                          ('spacer.restart_initial_threshold', UINT, 10, "Intial threshold for restarts"),
+                          ('spacer.restarts', BOOL, False, "Enable resetting obligation queue"),
+                          ('spacer.restart_initial_threshold', UINT, 10, "Initial threshold for restarts"),
                           ('spacer.random_seed', UINT, 0, "Random seed to be used by SMT solver"),
 
                           ('spacer.mbqi', BOOL, True, 'Enable mbqi'),

src/muz/base/hnf.h

@@ -11,7 +11,7 @@ Copyright (c) 2015 Microsoft Corporation
  
  Abstract:
  
-     Horn normal form convertion.
+     Horn normal form conversion.
 
  Author: