Try and fix stupid underscore error

Author: rprospero

sasdata/model_requirements.py

@@ -410,8 +410,8 @@ def slit_resolution(q_calc, q, width, length, n_length=30):
 
     where $I(u_j)$ is the value at the mid-point, and $\Delta u_j$ is the
     difference between consecutive edges which have been first converted
-    to $u$.  Only $u_j \in [0, \Delta q_\perp]$ are used, which corresponds
-    to $q_j \in \left[q, \sqrt{q^2 + \Delta q_\perp}\right]$, so
+    to $u$.  Only $u_j \in [0, \Delta q\_\perp]$ are used, which corresponds
+    to $q_j \in \left[q, \sqrt{q^2 + \Delta q\_\perp}\right]$, so
 
     .. math::
 
@@ -447,8 +447,8 @@ def slit_resolution(q_calc, q, width, length, n_length=30):
                 \left[q-\Delta q_\parallel, q+\Delta q_\parallel\right]
 
     However, we need to support cases were $u_j < 0$, which means using
-    $2 (q_{j+1} - q_j)$ when $q_j \in \left[0, q_\parallel-q_i\right]$.
-    This is not an issue for $q_i > q_\parallel$.
+    $2 (q_{j+1} - q_j)$ when $q_j \in \left[0, q\_\parallel-q\_i\right]$.
+    This is not an issue for $q_i > q\_\parallel$.
 
     For both $q_\perp > 0$ and $q_\parallel > 0$ we perform a 2 dimensional
     integration with