fix issues due to incomplete conversion form txt2html markup

doc/src/pair_gauss.rst

@@ -103,12 +103,13 @@ Mixing, shift, table, tail correction, restart, rRESPA info
 
 For atom type pairs I,J and I != J, the A, B, H, sigma_h, r_mh
 parameters, and the cutoff distance for these pair styles can be mixed:
-A (energy units)
-sqrt(1/B) (distance units, see below)
-H (energy units)
-sigma_h (distance units)
-r_mh (distance units)
-cutoff (distance units):ul
+
+* A (energy units)
+* :math:`\sqrt{\frac{1}{B}}` (distance units, see below)
+* H (energy units)
+* :math:`r_{mh}` (distance units)
+* :math:`\sigma_h` (distance units)
+* cutoff (distance units)
 
 The default mix value is *geometric*\ .
 Only *arithmetic* and *geometric* mix values are supported.

doc/src/pair_tersoff_mod.rst

@@ -145,7 +145,7 @@ coefficients in the formulae above:
 * c3
 * c4
 * c5
-* c0 (energy units, tersoff/mod/c only):ul
+* c0 (energy units, tersoff/mod/c only)
 
 The n, :math:`\eta`, :math:`\lambda_2`, B, :math:`\lambda_1`, and A parameters are only used for
 two-body interactions.  The :math:`\beta`, :math:`\alpha`, c1, c2, c3, c4, c5, h

doc/src/read_data.rst

@@ -1477,10 +1477,12 @@ The *Triangles* section must appear after the *Atoms* section.
 
 where the keywords have these meanings:
 
-vx,vy,vz = translational velocity of atom
-lx,ly,lz = angular momentum of aspherical atom
-wx,wy,wz = angular velocity of spherical atom
-ervel = electron radial velocity (0 for fixed-core):ul
+   .. parsed-literal::
+
+      vx,vy,vz = translational velocity of atom
+      lx,ly,lz = angular momentum of aspherical atom
+      wx,wy,wz = angular velocity of spherical atom
+      ervel = electron radial velocity (0 for fixed-core)
 
 The velocity lines can appear in any order.  This section can only be
 used after an *Atoms* section.  This is because the *Atoms* section