doc fixes

doc/src/fix_rheo.rst

@@ -102,12 +102,12 @@ more uniform spatial distribution. By default, shifting does not consider the
 type of a particle and therefore may be inappropriate in systems consisting
 of multiple atom types representing multiple fluid phases. However, two
 optional subarguments can follow the *shift* keyword, *exclude/type* and
-*scale/cross/type*.
+*scale/cross/type* to adjust shifting at fluid interfaces.
 
 The *exclude/type* option lets the user specify a list of atom types which
 are not shifted, *types*. A wild-card asterisk can be used in place
-of or in conjunction with the *types* argument to set the coefficients for
+of or in conjunction with the *types* argument to toggle shifting for
-multiple pairs of atom types.  This takes the form "\*" or "\*n" or "m\*"
+multiple atom types.  This takes the form "\*" or "\*n" or "m\*"
 or "m\*n".  If :math:`N` is the number of atom types, then an asterisk with
 no numeric values means all types from 1 to :math:`N`.  A leading asterisk
 means all types from 1 to n (inclusive).  A trailing asterisk means all types

doc/src/fix_rheo_pressure.rst

@@ -44,13 +44,12 @@ define different equations of state for different atom types. An equation
 must be specified for every atom type.
 
 One first defines the atom *types*. A wild-card asterisk can be used in place
-of or in conjunction with the *types* argument to set the coefficients for
+of or in conjunction with the *types* argument to set values for multiple atom
-multiple pairs of atom types.  This takes the form "\*" or "\*n" or "m\*"
+types.  This takes the form "\*" or "\*n" or "m\*" or "m\*n".  If :math:`N` is
-or "m\*n".  If :math:`N` is the number of atom types, then an asterisk with
+the number of atom types, then an asterisk with no numeric values means all types
-no numeric values means all types from 1 to :math:`N`.  A leading asterisk
+from 1 to :math:`N`.  A leading asterisk means all types from 1 to n (inclusive).
-means all types from 1 to n (inclusive).  A trailing asterisk means all types
+A trailing asterisk means all types from m to :math:`N` (inclusive).  A middle
-from m to :math:`N` (inclusive).  A middle asterisk means all types from m to n
+asterisk means all types from m to n (inclusive).
-(inclusive).
 
 The *types* definition is followed by the pressure style, *pstyle*. Current
 options *linear*, *taitwater*, and *cubic*. Style *linear* is a linear

doc/src/fix_rheo_thermal.rst

@@ -70,13 +70,13 @@ of the energy is used to shift energies. This may be inappropriate in systems
 with multiple atom types with different specific heats.
 
 For each property, one must first define a list of atom types. A wild-card
-asterisk can be used in place of or in conjunction with the *types* argument
+asterisk can be used in place of or in conjunction with the *types* argument to
-to set the coefficients for multiple pairs of atom types.  This takes the
+set values for multiple atom types.  This takes the form "\*" or "\*n" or "m\*"
-form "\*" or "\*n" or "m\*" or "m\*n".  If :math:`N` is the number of atom
+or "m\*n".  If :math:`N` is the number of atom types, then an asterisk with no
-types, then an asterisk with no numeric values means all types from 1 to
+numeric values means all types from 1 to :math:`N`.  A leading asterisk means
-:math:`N`.  A leading asterisk means all types from 1 to n (inclusive).
+all types from 1 to n (inclusive). A trailing asterisk means all types from m
-A trailing asterisk means all types from m to :math:`N` (inclusive).  A
+to :math:`N` (inclusive).  A middle asterisk means all types from m to n
-middle asterisk means all types from m to n (inclusive).
+(inclusive).
 
 The *types* definition for each property is followed by the style. Currently,
 the only option is *constant*. Style *constant* simply applies a constant value

doc/src/fix_rheo_viscosity.rst

@@ -45,13 +45,12 @@ viscosities for different atom types, but a viscosity must be specified for
 every atom type.
 
 One first defines the atom *types*. A wild-card asterisk can be used in place
-of or in conjunction with the *types* argument to set the coefficients for
+of or in conjunction with the *types* argument to set values for multiple atom
-multiple pairs of atom types.  This takes the form "\*" or "\*n" or "m\*"
+types.  This takes the form "\*" or "\*n" or "m\*" or "m\*n".  If :math:`N` is
-or "m\*n".  If :math:`N` is the number of atom types, then an asterisk with
+the number of atom types, then an asterisk with no numeric values means all types
-no numeric values means all types from 1 to :math:`N`.  A leading asterisk
+from 1 to :math:`N`.  A leading asterisk means all types from 1 to n (inclusive).
-means all types from 1 to n (inclusive).  A trailing asterisk means all types
+A trailing asterisk means all types from m to :math:`N` (inclusive).  A middle
-from m to :math:`N` (inclusive).  A middle asterisk means all types from m to n
+asterisk means all types from m to n (inclusive).
-(inclusive).
 
 The *types* definition is followed by the viscosity style, *vstyle*. Two
 options are available, *constant* and *power*. Style *constant* simply